Table 2.
Demographic and Behavioral Characteristics by Contraceptive Method Chosen at Enrollment and the Relative Risk of Choosing Long-Acting Reversible Contraception.
| Total n=2,500 | LARC n=1,678 | Other n=822 | Unadjusted RR (95%CI) | Adjusted RR (95%CI) | |||
|---|---|---|---|---|---|---|---|
| n | % | % | % | P | |||
| Recruitment Clinic | <0.001 | ||||||
| University | 1845 | 73.8 | 70.3 | 81.0 | Referent | Referent | |
| Abortion | 444 | 17.8 | 21.8 | 9.5 | 1.3 (1.2, 1.4) | 1.2 (1.1, 1.2) | |
| Family planning/community health | 211 | 8.4 | 7.9 | 9.5 | 0.9 (0.9, 1.1) | 1.0 (0.9, 1.1) | |
| Participant Demographic Characteristics | |||||||
| Race | 0.065 | ||||||
| Black | 1086 | 43.7 | 44.0 | 43.1 | 1.0 (0.9, 1.1) | 0.9 (0.8, 0.9) | |
| White | 1209 | 48.7 | 49.2 | 47.5 | Referent | Referent | |
| Other | 190 | 7.6 | 6.8 | 9.4 | 0.9 (0.8, 0.9) | 0.9 (0.8, 0.9) | |
| Hispanic ethnicity | 114 | 4.6 | 4.6 | 4.5 | 0.917 | ||
| Age | |||||||
| <18 | 99 | 4.0 | 3.5 | 4.9 | <0.001 | 0.8 (0.7, 0.9) | 1.1 (0.9, 1.3) |
| 18-20 | 426 | 17.0 | 14.4 | 22.4 | 0.7 (0.7, 0.8) | 0.9 (0.8, 1.0) | |
| 21-25 | 1053 | 42.1 | 39.8 | 46.8 | 0.8 (0.8, 0.9) | 1.0 (0.9, 1.0) | |
| >25 | 922 | 36.9 | 42.3 | 25.9 | Referent | Referent | |
| Marital status | <0.001 | ||||||
| Single/never married | 1592 | 63.7 | 58.2 | 75.1 | 0.8 (0.7, 0.8) | 0.9 (0.8, 0.9) | |
| Married/living with a partner | 737 | 29.5 | 33.6 | 21.0 | Referent | Referent | |
| Separated/divorced/widowed | 169 | 6.8 | 8.2 | 3.9 | 1.0 (1.0, 1.2) | 1.0 (0.9, 1.0) | |
| Trouble paying for transportation, housing, medical expenses or food in past 12 months | 968 | 39.0 | 40.6 | 35.8 | 0.023 | ||
| Currently receives food stamps, WIC, welfare, or unemployment | 719 | 28.9 | 32.6 | 21.3 | <0.001 | ||
| Trouble paying for basic necessities in past 12 months or currently receives public assistance | 1281 | 51.7 | 55.7 | 43.5 | <0.001 | 1.2 (1.1, 1.2) | 1.1 (1.0, 1.1) |
| Participant Behavioral Characteristics | |||||||
| Lifetime sexual partners | <0.001 | ||||||
| 0-1 | 364 | 14.6 | 12.3 | 19.2 | 0.9 (0.8, 0.9) | 0.8 (0.8, 0.9) | |
| 2-4 | 671 | 26.8 | 25.9 | 28.7 | Referent | Referent | |
| 5-9 | 849 | 34.0 | 35.5 | 30.8 | 1.1 (1.1, 1.2) | 1.0 (0.9, 1.1) | |
| 10+ | 616 | 24.6 | 26.3 | 21.3 | 1.1 (1.1, 1.2) | 1.0 (0.9, 1.1) | |
| Gravidity, mean (SD) | 2.0 (2.1) | 2.4 (2.2) | 1.2 (1.7) | <0.001 | |||
| Parity, mean (SD) | 0.9 (1.2) | 1.1 (1.2) | 0.5 (0.9) | <0.001 | 1.1 (1.1, 1.2) | 1.1 (1.1, 1.2) | |
| History of abortion | 1128 | 45.1 | 49.5 | 36.1 | <0.001 | 1.2 (1.1, 1.3) | 1.1 (1.1, 1.2) |
| Any STI diagnosis in lifetime* | 702 | 28.4 | 30.3 | 24.5 | 0.002 | 1.1 (1.1, 1.2) | 1.0 (0.9, 1.0) |
| Any STI at baseline** | 119 | 4.8 | 4.9 | 4.5 | 0.670 | ||
Note: LARC = long-acting reversible contraceptive methods; Other = depo-medroxyprogesterone acetate, oral contraceptive pills, vaginal ring,transdermal patch, diaphragm; RR = Relative Risk
*
Chlamydia trachomatis, Neisseria gonorrhoeae, Trichomonas vaginalis, Herpes, Syphilis or HIV
**
Chlamydia trachomatis, Neisseria gonorrhoeae, Trichomonas vaginalis